jdk.nashorn.internal.runtime.linker.NashornGuards Java Examples

The following examples show how to use jdk.nashorn.internal.runtime.linker.NashornGuards. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source Project: openjdk-8-source   Author: keerath   File: ScriptObject.java    License: GNU General Public License v2.0 6 votes vote down vote up
/**
 * Fall back if a function property is not found.
 * @param desc The call site descriptor
 * @param request the link request
 * @return GuardedInvocation to be invoked at call site.
 */
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final String       name      = desc.getNameToken(2);
    final FindProperty find      = findProperty(NO_SUCH_METHOD_NAME, true);
    final boolean      scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);

    if (find == null) {
        return noSuchProperty(desc, request);
    }

    final Object value = getObjectValue(find);
    if (! (value instanceof ScriptFunction)) {
        return createEmptyGetter(desc, name);
    }

    final ScriptFunction func = (ScriptFunction)value;
    final Object thiz = scopeCall && func.isStrict() ? ScriptRuntime.UNDEFINED : this;
    // TODO: It'd be awesome if we could bind "name" without binding "this".
    return new GuardedInvocation(MH.dropArguments(MH.constant(ScriptFunction.class,
            func.makeBoundFunction(thiz, new Object[] { name })), 0, Object.class),
            null, NashornGuards.getMapGuard(getMap()));
}
 
Example #2
Source Project: openjdk-8   Author: bpupadhyaya   File: ScriptObject.java    License: GNU General Public License v2.0 6 votes vote down vote up
/**
 * Fall back if a function property is not found.
 * @param desc The call site descriptor
 * @param request the link request
 * @return GuardedInvocation to be invoked at call site.
 */
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final String       name      = desc.getNameToken(2);
    final FindProperty find      = findProperty(NO_SUCH_METHOD_NAME, true);
    final boolean      scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);

    if (find == null) {
        return noSuchProperty(desc, request);
    }

    final Object value = getObjectValue(find);
    if (! (value instanceof ScriptFunction)) {
        return createEmptyGetter(desc, name);
    }

    final ScriptFunction func = (ScriptFunction)value;
    final Object thiz = scopeCall && func.isStrict() ? ScriptRuntime.UNDEFINED : this;
    // TODO: It'd be awesome if we could bind "name" without binding "this".
    return new GuardedInvocation(MH.dropArguments(MH.constant(ScriptFunction.class,
            func.makeBoundFunction(thiz, new Object[] { name })), 0, Object.class),
            null, NashornGuards.getMapGuard(getMap()));
}
 
Example #3
Source Project: nashorn   Author: ynsn   File: ScriptObject.java    License: GNU General Public License v2.0 6 votes vote down vote up
/**
 * Fall back if a function property is not found.
 * @param desc The call site descriptor
 * @param request the link request
 * @return GuardedInvocation to be invoked at call site.
 */
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final String       name      = desc.getNameToken(2);
    final FindProperty find      = findProperty(NO_SUCH_METHOD_NAME, true);
    final boolean      scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);

    if (find == null) {
        return noSuchProperty(desc, request);
    }

    final Object value = getObjectValue(find);
    if (! (value instanceof ScriptFunction)) {
        return createEmptyGetter(desc, name);
    }

    final ScriptFunction func = (ScriptFunction)value;
    final Object thiz = scopeCall && func.isStrict() ? ScriptRuntime.UNDEFINED : this;
    // TODO: It'd be awesome if we could bind "name" without binding "this".
    return new GuardedInvocation(MH.dropArguments(MH.constant(ScriptFunction.class,
            func.makeBoundFunction(thiz, new Object[] { name })), 0, Object.class),
            null, NashornGuards.getMapGuard(getMap()));
}
 
Example #4
Source Project: TencentKona-8   Author: Tencent   File: NativeString.java    License: GNU General Public License v2.0 5 votes vote down vote up
@Override
protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final Object self = request.getReceiver();
    final Class<?> returnType = desc.getMethodType().returnType();

    if (returnType == Object.class && JSType.isString(self)) {
        try {
            return new GuardedInvocation(MH.findStatic(MethodHandles.lookup(), NativeString.class, "get", desc.getMethodType()), NashornGuards.getStringGuard());
        } catch (final LookupException e) {
            //empty. Shouldn't happen. Fall back to super
        }
    }
    return super.findGetIndexMethod(desc, request);
}
 
Example #5
Source Project: TencentKona-8   Author: Tencent   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Fall back if a function property is not found.
 * @param desc The call site descriptor
 * @param request the link request
 * @return GuardedInvocation to be invoked at call site.
 */
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final String       name      = desc.getNameToken(2);
    final FindProperty find      = findProperty(NO_SUCH_METHOD_NAME, true);
    final boolean      scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);

    if (find == null) {
        return noSuchProperty(desc, request);
    }

    final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);

    final Object value = find.getObjectValue();
    if (!(value instanceof ScriptFunction)) {
        return createEmptyGetter(desc, explicitInstanceOfCheck, name);
    }

    final ScriptFunction func = (ScriptFunction)value;
    final Object         thiz = scopeCall && func.isStrict() ? UNDEFINED : this;
    // TODO: It'd be awesome if we could bind "name" without binding "this".
    // Since we're binding this we must use an identity guard here.
    return new GuardedInvocation(
            MH.dropArguments(
                    MH.constant(
                            ScriptFunction.class,
                            func.createBound(thiz, new Object[] { name })),
                    0,
                    Object.class),
            NashornGuards.combineGuards(
                    NashornGuards.getIdentityGuard(this),
                    NashornGuards.getMapGuard(getMap(), true)));
}
 
Example #6
Source Project: TencentKona-8   Author: Tencent   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
private GuardedInvocation createEmptyGetter(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String name) {
    if (NashornCallSiteDescriptor.isOptimistic(desc)) {
        throw new UnwarrantedOptimismException(UNDEFINED, NashornCallSiteDescriptor.getProgramPoint(desc), Type.OBJECT);
    }

    return new GuardedInvocation(Lookup.emptyGetter(desc.getMethodType().returnType()),
            NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), getProtoSwitchPoints(name, null),
            explicitInstanceOfCheck ? null : ClassCastException.class);
}
 
Example #7
Source Project: TencentKona-8   Author: Tencent   File: WithObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
private GuardedInvocation fixScopeCallSite(final GuardedInvocation link, final String name, final ScriptObject owner) {
    final GuardedInvocation newLink             = fixReceiverType(link, WITHSCOPEFILTER);
    final MethodHandle      expressionGuard     = expressionGuard(name, owner);
    final MethodHandle      filterGuardReceiver = filterGuardReceiver(newLink, WITHSCOPEFILTER);
    return link.replaceMethods(
            filterReceiver(
                    newLink.getInvocation(),
                    WITHSCOPEFILTER),
            NashornGuards.combineGuards(
                    expressionGuard,
                    filterGuardReceiver));
}
 
Example #8
Source Project: TencentKona-8   Author: Tencent   File: SetMethodCreator.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Composes from its components an actual guarded invocation that represents the dynamic setter method for the property.
 * @return the composed guarded invocation that represents the dynamic setter method for the property.
 */
GuardedInvocation createGuardedInvocation() {
    // getGuard() and getException() either both return null, or neither does. The reason for that is that now
    // getGuard returns a map guard that casts its argument to ScriptObject, and if that fails, we need to
    // relink on ClassCastException.
    final boolean explicitInstanceOfCheck = NashornGuards.explicitInstanceOfCheck(desc, request);
    return new GuardedInvocation(methodHandle, NashornGuards.getGuard(sobj, property, desc, explicitInstanceOfCheck),
            (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class);
}
 
Example #9
Source Project: jdk8u60   Author: chenghanpeng   File: NativeString.java    License: GNU General Public License v2.0 5 votes vote down vote up
@Override
protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final Object self = request.getReceiver();
    final Class<?> returnType = desc.getMethodType().returnType();

    if (returnType == Object.class && JSType.isString(self)) {
        try {
            return new GuardedInvocation(MH.findStatic(MethodHandles.lookup(), NativeString.class, "get", desc.getMethodType()), NashornGuards.getInstanceOf2Guard(String.class, ConsString.class));
        } catch (final LookupException e) {
            //empty. Shouldn't happen. Fall back to super
        }
    }
    return super.findGetIndexMethod(desc, request);
}
 
Example #10
Source Project: jdk8u60   Author: chenghanpeng   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Fall back if a function property is not found.
 * @param desc The call site descriptor
 * @param request the link request
 * @return GuardedInvocation to be invoked at call site.
 */
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final String       name      = desc.getNameToken(2);
    final FindProperty find      = findProperty(NO_SUCH_METHOD_NAME, true);
    final boolean      scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);

    if (find == null) {
        return noSuchProperty(desc, request);
    }

    final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);

    final Object value = find.getObjectValue();
    if (!(value instanceof ScriptFunction)) {
        return createEmptyGetter(desc, explicitInstanceOfCheck, name);
    }

    final ScriptFunction func = (ScriptFunction)value;
    final Object         thiz = scopeCall && func.isStrict() ? UNDEFINED : this;
    // TODO: It'd be awesome if we could bind "name" without binding "this".
    // Since we're binding this we must use an identity guard here.
    return new GuardedInvocation(
            MH.dropArguments(
                    MH.constant(
                            ScriptFunction.class,
                            func.makeBoundFunction(thiz, new Object[] { name })),
                    0,
                    Object.class),
            NashornGuards.combineGuards(
                    NashornGuards.getIdentityGuard(this),
                    NashornGuards.getMapGuard(getMap(), true)));
}
 
Example #11
Source Project: jdk8u60   Author: chenghanpeng   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
private GuardedInvocation createEmptyGetter(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String name) {
    if (NashornCallSiteDescriptor.isOptimistic(desc)) {
        throw new UnwarrantedOptimismException(UNDEFINED, NashornCallSiteDescriptor.getProgramPoint(desc), Type.OBJECT);
    }

    return new GuardedInvocation(Lookup.emptyGetter(desc.getMethodType().returnType()),
            NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), getProtoSwitchPoint(name, null),
            explicitInstanceOfCheck ? null : ClassCastException.class);
}
 
Example #12
Source Project: jdk8u60   Author: chenghanpeng   File: WithObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
private GuardedInvocation fixScopeCallSite(final GuardedInvocation link, final String name, final ScriptObject owner) {
    final GuardedInvocation newLink             = fixReceiverType(link, WITHSCOPEFILTER);
    final MethodHandle      expressionGuard     = expressionGuard(name, owner);
    final MethodHandle      filterGuardReceiver = filterGuardReceiver(newLink, WITHSCOPEFILTER);
    return link.replaceMethods(
            filterReceiver(
                    newLink.getInvocation(),
                    WITHSCOPEFILTER),
            NashornGuards.combineGuards(
                    expressionGuard,
                    filterGuardReceiver));
}
 
Example #13
Source Project: jdk8u60   Author: chenghanpeng   File: SetMethodCreator.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Composes from its components an actual guarded invocation that represents the dynamic setter method for the property.
 * @return the composed guarded invocation that represents the dynamic setter method for the property.
 */
GuardedInvocation createGuardedInvocation() {
    // getGuard() and getException() either both return null, or neither does. The reason for that is that now
    // getGuard returns a map guard that casts its argument to ScriptObject, and if that fails, we need to
    // relink on ClassCastException.
    final boolean explicitInstanceOfCheck = NashornGuards.explicitInstanceOfCheck(desc, request);
    return new GuardedInvocation(methodHandle, NashornGuards.getGuard(sobj, property, desc, explicitInstanceOfCheck),
            (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class);
}
 
Example #14
Source Project: openjdk-jdk8u   Author: AdoptOpenJDK   File: NativeString.java    License: GNU General Public License v2.0 5 votes vote down vote up
@Override
protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final Object self = request.getReceiver();
    final Class<?> returnType = desc.getMethodType().returnType();

    if (returnType == Object.class && JSType.isString(self)) {
        try {
            return new GuardedInvocation(MH.findStatic(MethodHandles.lookup(), NativeString.class, "get", desc.getMethodType()), NashornGuards.getStringGuard());
        } catch (final LookupException e) {
            //empty. Shouldn't happen. Fall back to super
        }
    }
    return super.findGetIndexMethod(desc, request);
}
 
Example #15
Source Project: openjdk-jdk8u   Author: AdoptOpenJDK   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Fall back if a function property is not found.
 * @param desc The call site descriptor
 * @param request the link request
 * @return GuardedInvocation to be invoked at call site.
 */
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final String       name      = desc.getNameToken(2);
    final FindProperty find      = findProperty(NO_SUCH_METHOD_NAME, true);
    final boolean      scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);

    if (find == null) {
        return noSuchProperty(desc, request);
    }

    final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);

    final Object value = find.getObjectValue();
    if (!(value instanceof ScriptFunction)) {
        return createEmptyGetter(desc, explicitInstanceOfCheck, name);
    }

    final ScriptFunction func = (ScriptFunction)value;
    final Object         thiz = scopeCall && func.isStrict() ? UNDEFINED : this;
    // TODO: It'd be awesome if we could bind "name" without binding "this".
    // Since we're binding this we must use an identity guard here.
    return new GuardedInvocation(
            MH.dropArguments(
                    MH.constant(
                            ScriptFunction.class,
                            func.createBound(thiz, new Object[] { name })),
                    0,
                    Object.class),
            NashornGuards.combineGuards(
                    NashornGuards.getIdentityGuard(this),
                    NashornGuards.getMapGuard(getMap(), true)));
}
 
Example #16
Source Project: openjdk-jdk8u   Author: AdoptOpenJDK   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
private GuardedInvocation createEmptyGetter(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String name) {
    if (NashornCallSiteDescriptor.isOptimistic(desc)) {
        throw new UnwarrantedOptimismException(UNDEFINED, NashornCallSiteDescriptor.getProgramPoint(desc), Type.OBJECT);
    }

    return new GuardedInvocation(Lookup.emptyGetter(desc.getMethodType().returnType()),
            NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), getProtoSwitchPoints(name, null),
            explicitInstanceOfCheck ? null : ClassCastException.class);
}
 
Example #17
Source Project: openjdk-jdk8u   Author: AdoptOpenJDK   File: WithObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
private GuardedInvocation fixScopeCallSite(final GuardedInvocation link, final String name, final ScriptObject owner) {
    final GuardedInvocation newLink             = fixReceiverType(link, WITHSCOPEFILTER);
    final MethodHandle      expressionGuard     = expressionGuard(name, owner);
    final MethodHandle      filterGuardReceiver = filterGuardReceiver(newLink, WITHSCOPEFILTER);
    return link.replaceMethods(
            filterReceiver(
                    newLink.getInvocation(),
                    WITHSCOPEFILTER),
            NashornGuards.combineGuards(
                    expressionGuard,
                    filterGuardReceiver));
}
 
Example #18
Source Project: openjdk-jdk8u   Author: AdoptOpenJDK   File: SetMethodCreator.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Composes from its components an actual guarded invocation that represents the dynamic setter method for the property.
 * @return the composed guarded invocation that represents the dynamic setter method for the property.
 */
GuardedInvocation createGuardedInvocation() {
    // getGuard() and getException() either both return null, or neither does. The reason for that is that now
    // getGuard returns a map guard that casts its argument to ScriptObject, and if that fails, we need to
    // relink on ClassCastException.
    final boolean explicitInstanceOfCheck = NashornGuards.explicitInstanceOfCheck(desc, request);
    return new GuardedInvocation(methodHandle, NashornGuards.getGuard(sobj, property, desc, explicitInstanceOfCheck),
            (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class);
}
 
Example #19
Source Project: openjdk-jdk8u-backup   Author: AdoptOpenJDK   File: NativeString.java    License: GNU General Public License v2.0 5 votes vote down vote up
@Override
protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final Object self = request.getReceiver();
    final Class<?> returnType = desc.getMethodType().returnType();

    if (returnType == Object.class && JSType.isString(self)) {
        try {
            return new GuardedInvocation(MH.findStatic(MethodHandles.lookup(), NativeString.class, "get", desc.getMethodType()), NashornGuards.getStringGuard());
        } catch (final LookupException e) {
            //empty. Shouldn't happen. Fall back to super
        }
    }
    return super.findGetIndexMethod(desc, request);
}
 
Example #20
Source Project: openjdk-jdk8u-backup   Author: AdoptOpenJDK   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Fall back if a function property is not found.
 * @param desc The call site descriptor
 * @param request the link request
 * @return GuardedInvocation to be invoked at call site.
 */
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final String       name      = desc.getNameToken(2);
    final FindProperty find      = findProperty(NO_SUCH_METHOD_NAME, true);
    final boolean      scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);

    if (find == null) {
        return noSuchProperty(desc, request);
    }

    final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);

    final Object value = find.getObjectValue();
    if (!(value instanceof ScriptFunction)) {
        return createEmptyGetter(desc, explicitInstanceOfCheck, name);
    }

    final ScriptFunction func = (ScriptFunction)value;
    final Object         thiz = scopeCall && func.isStrict() ? UNDEFINED : this;
    // TODO: It'd be awesome if we could bind "name" without binding "this".
    // Since we're binding this we must use an identity guard here.
    return new GuardedInvocation(
            MH.dropArguments(
                    MH.constant(
                            ScriptFunction.class,
                            func.createBound(thiz, new Object[] { name })),
                    0,
                    Object.class),
            NashornGuards.combineGuards(
                    NashornGuards.getIdentityGuard(this),
                    NashornGuards.getMapGuard(getMap(), true)));
}
 
Example #21
Source Project: openjdk-jdk8u-backup   Author: AdoptOpenJDK   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
private GuardedInvocation createEmptyGetter(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String name) {
    if (NashornCallSiteDescriptor.isOptimistic(desc)) {
        throw new UnwarrantedOptimismException(UNDEFINED, NashornCallSiteDescriptor.getProgramPoint(desc), Type.OBJECT);
    }

    return new GuardedInvocation(Lookup.emptyGetter(desc.getMethodType().returnType()),
            NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), getProtoSwitchPoints(name, null),
            explicitInstanceOfCheck ? null : ClassCastException.class);
}
 
Example #22
Source Project: openjdk-jdk8u-backup   Author: AdoptOpenJDK   File: WithObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
private GuardedInvocation fixScopeCallSite(final GuardedInvocation link, final String name, final ScriptObject owner) {
    final GuardedInvocation newLink             = fixReceiverType(link, WITHSCOPEFILTER);
    final MethodHandle      expressionGuard     = expressionGuard(name, owner);
    final MethodHandle      filterGuardReceiver = filterGuardReceiver(newLink, WITHSCOPEFILTER);
    return link.replaceMethods(
            filterReceiver(
                    newLink.getInvocation(),
                    WITHSCOPEFILTER),
            NashornGuards.combineGuards(
                    expressionGuard,
                    filterGuardReceiver));
}
 
Example #23
Source Project: openjdk-jdk8u-backup   Author: AdoptOpenJDK   File: SetMethodCreator.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Composes from its components an actual guarded invocation that represents the dynamic setter method for the property.
 * @return the composed guarded invocation that represents the dynamic setter method for the property.
 */
GuardedInvocation createGuardedInvocation() {
    // getGuard() and getException() either both return null, or neither does. The reason for that is that now
    // getGuard returns a map guard that casts its argument to ScriptObject, and if that fails, we need to
    // relink on ClassCastException.
    final boolean explicitInstanceOfCheck = NashornGuards.explicitInstanceOfCheck(desc, request);
    return new GuardedInvocation(methodHandle, NashornGuards.getGuard(sobj, property, desc, explicitInstanceOfCheck),
            (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class);
}
 
Example #24
Source Project: openjdk-jdk9   Author: AdoptOpenJDK   File: NativeString.java    License: GNU General Public License v2.0 5 votes vote down vote up
@Override
protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final Object self = request.getReceiver();
    final Class<?> returnType = desc.getMethodType().returnType();

    if (returnType == Object.class && JSType.isString(self)) {
        try {
            return new GuardedInvocation(MH.findStatic(MethodHandles.lookup(), NativeString.class, "get", desc.getMethodType()), NashornGuards.getStringGuard());
        } catch (final LookupException e) {
            //empty. Shouldn't happen. Fall back to super
        }
    }
    return super.findGetIndexMethod(desc, request);
}
 
Example #25
Source Project: openjdk-jdk9   Author: AdoptOpenJDK   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Fall back if a function property is not found.
 * @param desc The call site descriptor
 * @param request the link request
 * @return GuardedInvocation to be invoked at call site.
 */
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final String       name      = NashornCallSiteDescriptor.getOperand(desc);
    final FindProperty find      = findProperty(NO_SUCH_METHOD_NAME, true);
    final boolean      scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);

    if (find == null) {
        return noSuchProperty(desc, request)
                // Add proto switchpoint to switch from no-such-property to no-such-method if it is ever defined.
                .addSwitchPoint(getProtoSwitchPoint(NO_SUCH_METHOD_NAME));
    }

    final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);

    final Object value = find.getObjectValue();
    if (!(value instanceof ScriptFunction)) {
        return createEmptyGetter(desc, explicitInstanceOfCheck, name);
    }

    final ScriptFunction func = (ScriptFunction)value;
    final Object         thiz = scopeCall && func.isStrict() ? UNDEFINED : this;
    // TODO: It'd be awesome if we could bind "name" without binding "this".
    // Since we're binding this we must use an identity guard here.
    return new GuardedInvocation(
            MH.dropArguments(
                    MH.constant(
                            ScriptFunction.class,
                            func.createBound(thiz, new Object[] { name })),
                    0,
                    Object.class),
            NashornGuards.combineGuards(
                    NashornGuards.getIdentityGuard(this),
                    NashornGuards.getMapGuard(getMap(), true)))
            // Add a protoype switchpoint for the original name so this gets invalidated if it is ever defined.
            .addSwitchPoint(getProtoSwitchPoint(name));
}
 
Example #26
Source Project: openjdk-jdk9   Author: AdoptOpenJDK   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
private GuardedInvocation createEmptyGetter(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String name) {
    if (NashornCallSiteDescriptor.isOptimistic(desc)) {
        throw new UnwarrantedOptimismException(UNDEFINED, NashornCallSiteDescriptor.getProgramPoint(desc), Type.OBJECT);
    }

    return new GuardedInvocation(Lookup.emptyGetter(desc.getMethodType().returnType()),
            NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), getProtoSwitchPoints(name, null),
            explicitInstanceOfCheck ? null : ClassCastException.class);
}
 
Example #27
Source Project: openjdk-jdk9   Author: AdoptOpenJDK   File: WithObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
private GuardedInvocation fixScopeCallSite(final GuardedInvocation link, final String name, final ScriptObject owner) {
    final GuardedInvocation newLink             = fixReceiverType(link, WITHSCOPEFILTER);
    final MethodHandle      expressionGuard     = expressionGuard(name, owner);
    final MethodHandle      filteredGuard       = filterGuardReceiver(newLink, WITHSCOPEFILTER);
    return link.replaceMethods(
            filterReceiver(
                    newLink.getInvocation(),
                    WITHSCOPEFILTER),
            NashornGuards.combineGuards(
                    expressionGuard,
                    filteredGuard));
}
 
Example #28
Source Project: openjdk-jdk9   Author: AdoptOpenJDK   File: SetMethodCreator.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Composes from its components an actual guarded invocation that represents the dynamic setter method for the property.
 * @return the composed guarded invocation that represents the dynamic setter method for the property.
 */
GuardedInvocation createGuardedInvocation() {
    // getGuard() and getException() either both return null, or neither does. The reason for that is that now
    // getGuard returns a map guard that casts its argument to ScriptObject, and if that fails, we need to
    // relink on ClassCastException.
    final boolean explicitInstanceOfCheck = NashornGuards.explicitInstanceOfCheck(desc, request);
    return new GuardedInvocation(methodHandle, NashornGuards.getGuard(sobj, property, desc, explicitInstanceOfCheck),
            (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class);
}
 
Example #29
Source Project: hottub   Author: dsrg-uoft   File: NativeString.java    License: GNU General Public License v2.0 5 votes vote down vote up
@Override
protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final Object self = request.getReceiver();
    final Class<?> returnType = desc.getMethodType().returnType();

    if (returnType == Object.class && JSType.isString(self)) {
        try {
            return new GuardedInvocation(MH.findStatic(MethodHandles.lookup(), NativeString.class, "get", desc.getMethodType()), NashornGuards.getStringGuard());
        } catch (final LookupException e) {
            //empty. Shouldn't happen. Fall back to super
        }
    }
    return super.findGetIndexMethod(desc, request);
}
 
Example #30
Source Project: hottub   Author: dsrg-uoft   File: ScriptObject.java    License: GNU General Public License v2.0 5 votes vote down vote up
/**
 * Fall back if a function property is not found.
 * @param desc The call site descriptor
 * @param request the link request
 * @return GuardedInvocation to be invoked at call site.
 */
public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
    final String       name      = desc.getNameToken(2);
    final FindProperty find      = findProperty(NO_SUCH_METHOD_NAME, true);
    final boolean      scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);

    if (find == null) {
        return noSuchProperty(desc, request);
    }

    final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);

    final Object value = find.getObjectValue();
    if (!(value instanceof ScriptFunction)) {
        return createEmptyGetter(desc, explicitInstanceOfCheck, name);
    }

    final ScriptFunction func = (ScriptFunction)value;
    final Object         thiz = scopeCall && func.isStrict() ? UNDEFINED : this;
    // TODO: It'd be awesome if we could bind "name" without binding "this".
    // Since we're binding this we must use an identity guard here.
    return new GuardedInvocation(
            MH.dropArguments(
                    MH.constant(
                            ScriptFunction.class,
                            func.createBound(thiz, new Object[] { name })),
                    0,
                    Object.class),
            NashornGuards.combineGuards(
                    NashornGuards.getIdentityGuard(this),
                    NashornGuards.getMapGuard(getMap(), true)));
}